The eZ admin has significant stability issues. These are thought to relate to session time out issues but result in generic failure messages in the Admin.
Example error screens are attached. We feel that the errors occur more frequently when users session lengths are higher.
The feeling is that the underlying cause of these stability issues are loss of session - resulting in the application failing. The issues can be replicated by spending ~ 1 hour on eZ admin. The exact steps differ, as underlying reason does not seem to relate to specific tasks.
This issue results in users losing work, failures to publish content and is a critical issue in a fast moving media environment.